Lock



Jan. 13, 1931. N. B. HURD 1,788,834

LOCK

Filed Aug. l, 1928 :HI: M. 'am

Z4 INVENTQ ATTO R NEYS.

Nonnen; B.l "Bunn, or NEW BRITAIN; ,co

' CONNECTICUT" .was

p Ik lnnnorrcn'r;grsslivonrro: THE AMERioANy 1 Y' :HARDWARE CORPORATIQN, or' NEWKBnIrAIiv; oonnnnorrcu'r'g-A*CORPORATIONJOF, f

y' This invention rrelates" to loclrs and par# l j ticularly to a: ormoi "lock ,operated-[in one manner with one key,V and in another manner with a diiferent'ke'y.v

L Object'of the invention is topfovde' ai,

lock adapted. t0 be. normally used by the insertion of an 'ordinary-key, but which', by the use of a-special or master lrey may be' operated ina'diierentmanner.

Another object of thev nvention is to, pro-.i

' vide `a ,member having abutments thereonI disposedv betvveenk thecylinder and plug of' a tumbler'type of lock y so that when this mem 20 ber is held from rotation,v a projection on the plug will limit yrotation thereof, and, .when said member is released the plug may be reelyrotated about a complete revolution.-V

provide diate'member between the cylinder and plug ofa loclr operated by movement of one of the tumblers,tl1e tumbler in one position per mitting rotation of the member with the plug and in vanother position preventing rotationtherevvith, different keys being `used to control the positioning ofthe tumbler.-

'With these and yother objects in vievvV my] v invention consists in they features of'construco panying drawing.

.In 'the accompanying tion, 1 have shown`r myv inventionfembodied yin a multiple tumbler lock, but it Willfbe understood that the invention can be other- Wiseembodied and that the drawing is not Y,to be construed vas defining or limitingthe scope'goffinventiom' the vclaim appended to' thisspecification being relied Aupon for that purpose.' f A Y Y .Y

In the drawing;

,.Fig. l is a side elevation of a lock v viththeVV ordinary key inserted, parts being broken .l

l j Astill further object of the invention isto 4 controlling means for an interme-` tio-n'and operation set forth in thefollowing f specilication andy illustratedV in the accom-p y t drawing annexed g. hereto and orming'a part of this .specifica- 'JavayftolmoreQclearlysliow'theirconstruc i i parts forming; the .present invention.

now deemed preferable, `but itis to be under-- made With-inthe scope oftheappended claim kvvithont departing fromzthe spirit of `the inf 'ventiorr i the .drawing I provide aiocksylindef 10 with afrotatable ley plug 1l -mountedtliereim lith-in the plug ll is the keyinserting .slot

each tumblenicomprisinga driverlll and' folloiveri` 15f and being spring pressed in `the usual manner;v Balls. IGWithi'ntlie bottom i-,is a .viewsimilarto/Fig. 3

"FigQG is a .crosssectional View taken upon A. Fig. "Zzjis an isometricfviewof lonefnofth'e f p In the above :draw/ing,V `I have shown '.biit yone embodimentof the invention which; .is i" Stoodthatchanges and modifications maybe l' y lio` j Referring, morein detail `to Y the lligvgures of n i' ofthe holes lzinthe plug llfacilitate infser-v cylinder 1.0, the plug V1l and the .tumblers 'are i' form it :isjnotsthought that vfurther"description of tliesepartsfis necessary.

` l.The@rearvportionlof thef'plug'll is of reduced diameter providing an. annular'space betweenf the 'plug 1l', andthe .cylinder l0,

tion of a key such as shown at 17.v As the f,

or .mayy be of any standard orf Yconventional y l Within this annular recess is a small sleevev j.

'18 free-ly rotatablejnpon-the plug ll and rel-' *forming ac'ompletey circle,l and theV rear half Ia substantially halfcirclef thus forming sub.

lor shoulders 19. Within the completeV annular partpof the sleeve` 18k a vsuitable hole 2O ativetoktlie.cylinderflO. This sleeve ..l8lis .cut asvvay for 4about one, half "its length Y asisf vindicated,Clearly inFig. 7; the orivardhalf Stantially diametrically opposite labutments g. k2isga cross'sectionalfvieiv takenupon l er @entre 'ae-f5.

Y 'Y K 75 y. 'l2 ,oijl the usual type.` Vnfsgdapted to koperate Y in suitable registering-holesl,in the plugll l and cylinder 1Q are tumblers, six being shown,

Vthrough'whiuzh the driver 14 andV follower 15'*VV .e Within. the Space formed by um vCutmvay p0rtion of the "sleevelS between` the' 'abutments of one of the tumblers may pass; On the plug 11A is an outstanding projection 21 lin thev form of a pin, whi'oh,when theV plug 11 is rotated by .the ordinary key, .'will'osci'llate 19, Referring to Fig. 1 of the drawing *it*VK vwill b e seen that oueofpthe follewers .p15 eae. tends through .the hole; the .518616,18 and thus holds the sleeve from rotation relative the tumbler, rotation ofthe-plug 11 bythe sleeveto saidplug and release said plug and sleeve Yfrom said cylinder to permit full rota-V tion VAof. said parts, and operable by a differentkey to lock said sleeve to said 'cylinder and release`it-from said plug to permit the fplugjto be'rotated in jsaidleylinder and sleeve tto anextent limited to Vthe scope of the cutawayportion. i'

Y f NORMAN B. HURD.

' i v to the cylinder 10. With the sleeve-18 y held in fixed position .by the follower liof` ordinary key 17 is limited by the stop 21 onr the plug 11 abuttingl ag'ain'stithe'ends 19 of the out away parts of the sleeve18.; The

roll-backV 22v attached in` thev usual iiianner to the rearend ofthe p1ug11 oan, therefore,

be `actuated between 'certain xedpsitions which are suliieient i to operate "the Vlatch or other partoperated byV the rollback 22.

, In orderto permitthe plug Ilfandro'll'.

*back 22 to be freely rotatable through"acom-r plete revolution upon insertion ofI aspecialA or master Vkey 23 'the "followery 15 'is'inoved outward so that it is freelfroiii'thefsleeve 18 andthe driverllisfwithin theholein the sleeve For this purpose' tlie master key 23 4having a higher tumbler yrecess thanfthe ordinarykey 17 Vis inserted, which elevates the driver 14 vto a positioniso thatjits outer end is in alignment Vwith the outer peripheryy of i. the sleeve 18. The driverll', therefore,f0r

this tumbler enters the" hole 20'in tl'reslee've 18 so that the sleeve18 isfree to-rotate with jtlieI plug 11.y With the sleeve v118 rotating with the plug 11'the stop 21 does notgeontaet with Y ythe endsor abutments'l) of thev'out away portion in the sleeve 18, thus permitting com `rpermit the masterkey'23, 'whiohmay be f slifrhtly longer than the ordinary keyl'l, to

fu ly 'enter the key slot 12 in the plug 11 the front face of the sleeve' 18 may be notched vorrecessed as shown clearlyrat: 24 in Fig. 7.

Y Y The 'ordinary key operatingtol oseillate the vplug 11 between interengaging abutnients to 'limit itsmovement may be used'to operate y the latch with which the lock is provided.

plete rotation of theiplug 1.1. 'In Order vto y' Thespecialor master-keyioperatng'to re-4 Y* tative niovement'of the'plug 11'may beused` to. operate a locking bolt *with -which'the 'lock v rotatable therein,a sleeve on the inner por-` f, tion'of` said plug and within said Cylinder,

ay portion of said sleevebeing cut away,"V al j stop carried by and projeoting radially from Y said' plug and standing in said cut-awayfpo'rtion of said sleeve and ,within said Cylinder,

,and a pin/tumbler comprising a plurality-*of Y sections operableby'onekey to lookf'said- 

